下列各项中，可以用来调查了解内部控制的方法是：

A．计算 　

B．监盘

C．观察

D．函证

. Dream of the Red Chamber is _____ worth _____ because we can learn a lot about the noble families in the feudal society.

A．very; reading

B．well; to be read

C．well; reading

D．very; to be read